Need help on C

Richard manages an electronics store where customers can purchase phones, tablets, or accessories for their technology needs. He is trying to plan for future profitability and came upon a break-even number ( 80 units in monthly sales) that his predecessor, Annie, had calculated. Unfortunately, Richard found no other supporting calculations or details to determine how many of those units were phones, tablets, and accessories. Realizing that he needs as much cost, volume, and revenue information as possible, Richard dug up the following information for the store. He also determined that 25% of sales volume generally is from tablets. Additionally, customers usually purchase 1.5 times as many accessories as they do phones. Your answer is correct. Based on the above information, what is the sales mix for the three products? Phones Tablets Accessories % % % At the break-even point, how many of the 80 units must have been phones? Phones units eTextbook and Media Solution Attempts: 3 of 3 used (c) For future planning purposes, help Richard determine how many units of each product the store needs to sell in order to make a monthly operating profit of $21,600. Phones Tablets Accessories units units units